Thermal decomposition of coal fly ash by concentrated sulfuric acid and alumina extraction process based on it

2011 ◽  
Vol 92 (6) ◽  
pp. 1213-1219 ◽  
Author(s):  
Guanghui Bai ◽  
YunHai Qiao ◽  
Bo Shen ◽  
ShuangLi Chen
Keyword(s):  
Thermal Decomposition ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Extraction Process ◽  
Concentrated Sulfuric Acid

Extracting Alumina from Coal Fly Ash with Concentrated Sulfuric Acid Sintering and Ultrasound Aided Leaching

2015 ◽  
pp. 31-38
Author(s):  
Wenbo Luo ◽  
Jilai Xue ◽  
Jun Zhu ◽  
Kang Liu ◽  
Chunlei Yang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Concentrated Sulfuric Acid

Digesting high-aluminum coal fly ash with concentrated sulfuric acid at high temperatures

2018 ◽  
Vol 180 ◽  
pp. 41-48 ◽  
Author(s):  
Cundi Wei ◽  
Shan Cheng ◽  
Fujie Zhu ◽  
Xiaoling Tan ◽  
Wenqing Li ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
High Temperatures ◽  
Coal Fly Ash ◽  
Concentrated Sulfuric Acid ◽  
High Aluminum

Extracting Alumina from Coal Fly Ash with Concentrated Sulfuric Acid Sintering and Ultrasound Aided Leaching

2015 ◽  
pp. 31-38
Author(s):  
Wenbo Luo ◽  
Jilai Xue ◽  
Jun Zhu ◽  
Kang Liu ◽  
Chunlei Yang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Concentrated Sulfuric Acid

Recovery of gallium from sulfuric acid leach liquor of coal fly ash by stepwise separation using P507 and Cyanex 272

2020 ◽  
Vol 381 ◽  
pp. 122699 ◽  
Author(s):  
Zesen Zhao ◽  
Li Cui ◽  
Yanxia Guo ◽  
Huiquan Li ◽  
Fangqin Cheng
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Leach Liquor ◽  
Cyanex 272 ◽  
Acid Leach

Thermal Decomposition Mechanism of Desilication Coal Fly Ash by Low-Lime Sinter Method for Alumina Extraction

2015 ◽  
Vol 486 (1) ◽  
pp. 143-155 ◽  
Author(s):  
Zhouqing Jiang ◽  
Hongwen Ma ◽  
Jing Yang ◽  
Xi Ma ◽  
Jiangyan Yuan
Keyword(s):  
Thermal Decomposition ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Decomposition Mechanism ◽  
Thermal Decomposition Mechanism ◽  
Sinter Method

Extraction of Aluminum from Coal Fly Ash Using Pressurized Sulfuric Acid Leaching with Emphasis on Optimization and Mechanism

JOM ◽  
2021 ◽  
Author(s):  
Peng Wang ◽  
Huiyong Liu ◽  
Fangyan Zheng ◽  
Yue Liu ◽  
Ge Kuang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Acid Leaching ◽  
Sulfuric Acid Leaching

Study on the Treatment of Phosphate-Containing Waste Water by Modified Fly Ash

2012 ◽  
Vol 534 ◽  
pp. 328-332
Author(s):  
Juan Juan Song
Keyword(s):  
Waste Water ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Ph Value ◽  
Adsorption Efficiency ◽  
Drying Time ◽  
Phosphorus Containing ◽  
Concentrated Sulfuric Acid ◽  
The Impact ◽  
Modified Fly Ash

In this study, fly ash was modified by concentrated sulfuric acid, and it was used in the treatment of phosphorus-containing wastewater, then we have investigated the impact of the different modification conditions on the adsorption, the results show that: in the condition of 5g of fly ash by adding 0.15 mL of concentrated sulfuric acid and 3 mL water, 1.5 h of drying time, the temperature of 100°C, the effect of removaling Phosphorus is the best,and the adsorption efficiency can reach 94.6%. The adsorption rate was fast, and the adsorption can react in condition of wide pH value.

Dewaterability of Excess Activated Sludge with Fly Ash Conditioning

2013 ◽  
Vol 726-731 ◽  
pp. 2651-2654
Author(s):  
Chang Nian Wu ◽  
Wei Hua Li ◽  
Qi Ling ◽  
Li Wang ◽  
Fa Kang Pan ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Activated Sludge ◽  
Extracellular Polymeric Substance ◽  
Specific Resistance ◽  
Coal Fly Ash ◽  
Polymeric Substance ◽  
Conditioning Process ◽  
Sludge Dewaterability ◽  
Sludge Conditioning

The coal fly ash (CFA)/coal fly ash modified by sulfuric acid (MCFA)-conditioned sludge dewaterability was investigated in this study. Specific resistance of filtration (SRF) was used to assess the sludge dewaterability. Extracellular polymeric substance (EPS) was determined in attempt to explain sludge conditioning process. The results showed that SRF of the sludge significantly decreased with coal fly ash addition, and the MCFA showed much stronger conditioning capacity than the raw coal fly ash. Under a MCFA dosage of 36g.L-1, the SRF of the sludge decreased from 1.18×1012 to 6.47×1010 m.kg1, and EPS concentration of the sludge decreased from 32.64 to 17.55mg.L-1. The sludge conditioning mechanisms with MCFA mainly included improving adsorption bridging and providing the water transmitting passages by skeleton builder.

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